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freebsd-dev/contrib/perl5/utf8.c
Mark Murray fc75d06644 Vendor import Perl 5.6.1
2002-03-16 20:14:30 +00:00

1322 lines
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/* utf8.c
*
* Copyright (c) 1998-2001, Larry Wall
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
/*
* 'What a fix!' said Sam. 'That's the one place in all the lands we've ever
* heard of that we don't want to see any closer; and that's the one place
* we're trying to get to! And that's just where we can't get, nohow.'
*
* 'Well do I understand your speech,' he answered in the same language;
* 'yet few strangers do so. Why then do you not speak in the Common Tongue,
* as is the custom in the West, if you wish to be answered?'
*
* ...the travellers perceived that the floor was paved with stones of many
* hues; branching runes and strange devices intertwined beneath their feet.
*/
#include "EXTERN.h"
#define PERL_IN_UTF8_C
#include "perl.h"
/* Unicode support */
/*
=for apidoc A|U8*|uv_to_utf8|U8 *d|UV uv
Adds the UTF8 representation of the Unicode codepoint C<uv> to the end
of the string C<d>; C<d> should be have at least C<UTF8_MAXLEN+1> free
bytes available. The return value is the pointer to the byte after the
end of the new character. In other words,
d = uv_to_utf8(d, uv);
is the recommended Unicode-aware way of saying
*(d++) = uv;
=cut
*/
U8 *
Perl_uv_to_utf8(pTHX_ U8 *d, UV uv)
{
if (uv < 0x80) {
*d++ = uv;
return d;
}
if (uv < 0x800) {
*d++ = (( uv >> 6) | 0xc0);
*d++ = (( uv & 0x3f) | 0x80);
return d;
}
if (uv < 0x10000) {
*d++ = (( uv >> 12) | 0xe0);
*d++ = (((uv >> 6) & 0x3f) | 0x80);
*d++ = (( uv & 0x3f) | 0x80);
return d;
}
if (uv < 0x200000) {
*d++ = (( uv >> 18) | 0xf0);
*d++ = (((uv >> 12) & 0x3f) | 0x80);
*d++ = (((uv >> 6) & 0x3f) | 0x80);
*d++ = (( uv & 0x3f) | 0x80);
return d;
}
if (uv < 0x4000000) {
*d++ = (( uv >> 24) | 0xf8);
*d++ = (((uv >> 18) & 0x3f) | 0x80);
*d++ = (((uv >> 12) & 0x3f) | 0x80);
*d++ = (((uv >> 6) & 0x3f) | 0x80);
*d++ = (( uv & 0x3f) | 0x80);
return d;
}
if (uv < 0x80000000) {
*d++ = (( uv >> 30) | 0xfc);
*d++ = (((uv >> 24) & 0x3f) | 0x80);
*d++ = (((uv >> 18) & 0x3f) | 0x80);
*d++ = (((uv >> 12) & 0x3f) | 0x80);
*d++ = (((uv >> 6) & 0x3f) | 0x80);
*d++ = (( uv & 0x3f) | 0x80);
return d;
}
#ifdef HAS_QUAD
if (uv < UTF8_QUAD_MAX)
#endif
{
*d++ = 0xfe; /* Can't match U+FEFF! */
*d++ = (((uv >> 30) & 0x3f) | 0x80);
*d++ = (((uv >> 24) & 0x3f) | 0x80);
*d++ = (((uv >> 18) & 0x3f) | 0x80);
*d++ = (((uv >> 12) & 0x3f) | 0x80);
*d++ = (((uv >> 6) & 0x3f) | 0x80);
*d++ = (( uv & 0x3f) | 0x80);
return d;
}
#ifdef HAS_QUAD
{
*d++ = 0xff; /* Can't match U+FFFE! */
*d++ = 0x80; /* 6 Reserved bits */
*d++ = (((uv >> 60) & 0x0f) | 0x80); /* 2 Reserved bits */
*d++ = (((uv >> 54) & 0x3f) | 0x80);
*d++ = (((uv >> 48) & 0x3f) | 0x80);
*d++ = (((uv >> 42) & 0x3f) | 0x80);
*d++ = (((uv >> 36) & 0x3f) | 0x80);
*d++ = (((uv >> 30) & 0x3f) | 0x80);
*d++ = (((uv >> 24) & 0x3f) | 0x80);
*d++ = (((uv >> 18) & 0x3f) | 0x80);
*d++ = (((uv >> 12) & 0x3f) | 0x80);
*d++ = (((uv >> 6) & 0x3f) | 0x80);
*d++ = (( uv & 0x3f) | 0x80);
return d;
}
#endif
}
/*
=for apidoc A|STRLEN|is_utf8_char|U8 *s
Tests if some arbitrary number of bytes begins in a valid UTF-8 character.
The actual number of bytes in the UTF-8 character will be returned if it
is valid, otherwise 0.
=cut
*/
STRLEN
Perl_is_utf8_char(pTHX_ U8 *s)
{
U8 u = *s;
STRLEN slen, len;
UV uv, ouv;
if (UTF8_IS_ASCII(u))
return 1;
if (!UTF8_IS_START(u))
return 0;
len = UTF8SKIP(s);
if (len < 2 || !UTF8_IS_CONTINUATION(s[1]))
return 0;
slen = len - 1;
s++;
uv = u;
ouv = uv;
while (slen--) {
if (!UTF8_IS_CONTINUATION(*s))
return 0;
uv = UTF8_ACCUMULATE(uv, *s);
if (uv < ouv)
return 0;
ouv = uv;
s++;
}
if (UNISKIP(uv) < len)
return 0;
return len;
}
/*
=for apidoc A|bool|is_utf8_string|U8 *s|STRLEN len
Returns true if first C<len> bytes of the given string form valid a UTF8
string, false otherwise.
=cut
*/
bool
Perl_is_utf8_string(pTHX_ U8 *s, STRLEN len)
{
U8* x = s;
U8* send;
STRLEN c;
if (!len)
len = strlen((char *)s);
send = s + len;
while (x < send) {
c = is_utf8_char(x);
if (!c)
return FALSE;
x += c;
}
if (x != send)
return FALSE;
return TRUE;
}
/*
=for apidoc A|U8* s|utf8_to_uv|STRLEN curlen|STRLEN *retlen|U32 flags
Returns the character value of the first character in the string C<s>
which is assumed to be in UTF8 encoding and no longer than C<curlen>;
C<retlen> will be set to the length, in bytes, of that character.
If C<s> does not point to a well-formed UTF8 character, the behaviour
is dependent on the value of C<flags>: if it contains UTF8_CHECK_ONLY,
it is assumed that the caller will raise a warning, and this function
will silently just set C<retlen> to C<-1> and return zero. If the
C<flags> does not contain UTF8_CHECK_ONLY, warnings about
malformations will be given, C<retlen> will be set to the expected
length of the UTF-8 character in bytes, and zero will be returned.
The C<flags> can also contain various flags to allow deviations from
the strict UTF-8 encoding (see F<utf8.h>).
=cut */
UV
Perl_utf8_to_uv(pTHX_ U8* s, STRLEN curlen, STRLEN* retlen, U32 flags)
{
UV uv = *s, ouv;
STRLEN len = 1;
#ifdef EBCDIC
bool dowarn = 0;
#else
bool dowarn = ckWARN_d(WARN_UTF8);
#endif
STRLEN expectlen = 0;
U32 warning = 0;
/* This list is a superset of the UTF8_ALLOW_XXX. */
#define UTF8_WARN_EMPTY 1
#define UTF8_WARN_CONTINUATION 2
#define UTF8_WARN_NON_CONTINUATION 3
#define UTF8_WARN_FE_FF 4
#define UTF8_WARN_SHORT 5
#define UTF8_WARN_OVERFLOW 6
#define UTF8_WARN_SURROGATE 7
#define UTF8_WARN_BOM 8
#define UTF8_WARN_LONG 9
#define UTF8_WARN_FFFF 10
if (curlen == 0 &&
!(flags & UTF8_ALLOW_EMPTY)) {
warning = UTF8_WARN_EMPTY;
goto malformed;
}
if (UTF8_IS_ASCII(uv)) {
if (retlen)
*retlen = 1;
return *s;
}
if (UTF8_IS_CONTINUATION(uv) &&
!(flags & UTF8_ALLOW_CONTINUATION)) {
warning = UTF8_WARN_CONTINUATION;
goto malformed;
}
if (UTF8_IS_START(uv) && curlen > 1 && !UTF8_IS_CONTINUATION(s[1]) &&
!(flags & UTF8_ALLOW_NON_CONTINUATION)) {
warning = UTF8_WARN_NON_CONTINUATION;
goto malformed;
}
if ((uv == 0xfe || uv == 0xff) &&
!(flags & UTF8_ALLOW_FE_FF)) {
warning = UTF8_WARN_FE_FF;
goto malformed;
}
if (!(uv & 0x20)) { len = 2; uv &= 0x1f; }
else if (!(uv & 0x10)) { len = 3; uv &= 0x0f; }
else if (!(uv & 0x08)) { len = 4; uv &= 0x07; }
else if (!(uv & 0x04)) { len = 5; uv &= 0x03; }
else if (!(uv & 0x02)) { len = 6; uv &= 0x01; }
else if (!(uv & 0x01)) { len = 7; uv = 0; }
else { len = 13; uv = 0; } /* whoa! */
if (retlen)
*retlen = len;
expectlen = len;
if ((curlen < expectlen) &&
!(flags & UTF8_ALLOW_SHORT)) {
warning = UTF8_WARN_SHORT;
goto malformed;
}
len--;
s++;
ouv = uv;
while (len--) {
if (!UTF8_IS_CONTINUATION(*s) &&
!(flags & UTF8_ALLOW_NON_CONTINUATION)) {
s--;
warning = UTF8_WARN_NON_CONTINUATION;
goto malformed;
}
else
uv = UTF8_ACCUMULATE(uv, *s);
if (!(uv > ouv)) {
/* These cannot be allowed. */
if (uv == ouv) {
if (!(flags & UTF8_ALLOW_LONG)) {
warning = UTF8_WARN_LONG;
goto malformed;
}
}
else { /* uv < ouv */
/* This cannot be allowed. */
warning = UTF8_WARN_OVERFLOW;
goto malformed;
}
}
s++;
ouv = uv;
}
if (UNICODE_IS_SURROGATE(uv) &&
!(flags & UTF8_ALLOW_SURROGATE)) {
warning = UTF8_WARN_SURROGATE;
goto malformed;
} else if (UNICODE_IS_BYTE_ORDER_MARK(uv) &&
!(flags & UTF8_ALLOW_BOM)) {
warning = UTF8_WARN_BOM;
goto malformed;
} else if ((expectlen > UNISKIP(uv)) &&
!(flags & UTF8_ALLOW_LONG)) {
warning = UTF8_WARN_LONG;
goto malformed;
} else if (UNICODE_IS_ILLEGAL(uv) &&
!(flags & UTF8_ALLOW_FFFF)) {
warning = UTF8_WARN_FFFF;
goto malformed;
}
return uv;
malformed:
if (flags & UTF8_CHECK_ONLY) {
if (retlen)
*retlen = -1;
return 0;
}
if (dowarn) {
SV* sv = sv_2mortal(newSVpv("Malformed UTF-8 character ", 0));
switch (warning) {
case 0: /* Intentionally empty. */ break;
case UTF8_WARN_EMPTY:
Perl_sv_catpvf(aTHX_ sv, "(empty string)");
break;
case UTF8_WARN_CONTINUATION:
Perl_sv_catpvf(aTHX_ sv, "(unexpected continuation byte 0x%02"UVxf")", uv);
break;
case UTF8_WARN_NON_CONTINUATION:
Perl_sv_catpvf(aTHX_ sv, "(unexpected non-continuation byte 0x%02"UVxf" after start byte 0x%02"UVxf")",
(UV)s[1], uv);
break;
case UTF8_WARN_FE_FF:
Perl_sv_catpvf(aTHX_ sv, "(byte 0x%02"UVxf")", uv);
break;
case UTF8_WARN_SHORT:
Perl_sv_catpvf(aTHX_ sv, "(%d byte%s, need %d)",
curlen, curlen == 1 ? "" : "s", expectlen);
break;
case UTF8_WARN_OVERFLOW:
Perl_sv_catpvf(aTHX_ sv, "(overflow at 0x%"UVxf", byte 0x%02x)",
ouv, *s);
break;
case UTF8_WARN_SURROGATE:
Perl_sv_catpvf(aTHX_ sv, "(UTF-16 surrogate 0x%04"UVxf")", uv);
break;
case UTF8_WARN_BOM:
Perl_sv_catpvf(aTHX_ sv, "(byte order mark 0x%04"UVxf")", uv);
break;
case UTF8_WARN_LONG:
Perl_sv_catpvf(aTHX_ sv, "(%d byte%s, need %d)",
expectlen, expectlen == 1 ? "": "s", UNISKIP(uv));
break;
case UTF8_WARN_FFFF:
Perl_sv_catpvf(aTHX_ sv, "(character 0x%04"UVxf")", uv);
break;
default:
Perl_sv_catpvf(aTHX_ sv, "(unknown reason)");
break;
}
if (warning) {
char *s = SvPVX(sv);
if (PL_op)
Perl_warner(aTHX_ WARN_UTF8,
"%s in %s", s, PL_op_desc[PL_op->op_type]);
else
Perl_warner(aTHX_ WARN_UTF8, "%s", s);
}
}
if (retlen)
*retlen = expectlen ? expectlen : len;
return 0;
}
/*
=for apidoc A|U8* s|utf8_to_uv_simple|STRLEN *retlen
Returns the character value of the first character in the string C<s>
which is assumed to be in UTF8 encoding; C<retlen> will be set to the
length, in bytes, of that character.
If C<s> does not point to a well-formed UTF8 character, zero is
returned and retlen is set, if possible, to -1.
=cut
*/
UV
Perl_utf8_to_uv_simple(pTHX_ U8* s, STRLEN* retlen)
{
return Perl_utf8_to_uv(aTHX_ s, UTF8_MAXLEN, retlen, 0);
}
/*
=for apidoc A|STRLEN|utf8_length|U8* s|U8 *e
Return the length of the UTF-8 char encoded string C<s> in characters.
Stops at C<e> (inclusive). If C<e E<lt> s> or if the scan would end
up past C<e>, croaks.
=cut
*/
STRLEN
Perl_utf8_length(pTHX_ U8* s, U8* e)
{
STRLEN len = 0;
/* Note: cannot use UTF8_IS_...() too eagerly here since e.g.
* the bitops (especially ~) can create illegal UTF-8.
* In other words: in Perl UTF-8 is not just for Unicode. */
if (e < s)
Perl_croak(aTHX_ "panic: utf8_length: unexpected end");
while (s < e) {
U8 t = UTF8SKIP(s);
if (e - s < t)
Perl_croak(aTHX_ "panic: utf8_length: unaligned end");
s += t;
len++;
}
return len;
}
/*
=for apidoc A|IV|utf8_distance|U8 *a|U8 *b
Returns the number of UTF8 characters between the UTF-8 pointers C<a>
and C<b>.
WARNING: use only if you *know* that the pointers point inside the
same UTF-8 buffer.
=cut */
IV
Perl_utf8_distance(pTHX_ U8 *a, U8 *b)
{
IV off = 0;
/* Note: cannot use UTF8_IS_...() too eagerly here since e.g.
* the bitops (especially ~) can create illegal UTF-8.
* In other words: in Perl UTF-8 is not just for Unicode. */
if (a < b) {
while (a < b) {
U8 c = UTF8SKIP(a);
if (b - a < c)
Perl_croak(aTHX_ "panic: utf8_distance: unaligned end");
a += c;
off--;
}
}
else {
while (b < a) {
U8 c = UTF8SKIP(b);
if (a - b < c)
Perl_croak(aTHX_ "panic: utf8_distance: unaligned end");
b += c;
off++;
}
}
return off;
}
/*
=for apidoc A|U8*|utf8_hop|U8 *s|I32 off
Return the UTF-8 pointer C<s> displaced by C<off> characters, either
forward or backward.
WARNING: do not use the following unless you *know* C<off> is within
the UTF-8 data pointed to by C<s> *and* that on entry C<s> is aligned
on the first byte of character or just after the last byte of a character.
=cut */
U8 *
Perl_utf8_hop(pTHX_ U8 *s, I32 off)
{
/* Note: cannot use UTF8_IS_...() too eagerly here since e.g
* the bitops (especially ~) can create illegal UTF-8.
* In other words: in Perl UTF-8 is not just for Unicode. */
if (off >= 0) {
while (off--)
s += UTF8SKIP(s);
}
else {
while (off++) {
s--;
while (UTF8_IS_CONTINUATION(*s))
s--;
}
}
return s;
}
/*
=for apidoc A|U8 *|utf8_to_bytes|U8 *s|STRLEN *len
Converts a string C<s> of length C<len> from UTF8 into byte encoding.
Unlike C<bytes_to_utf8>, this over-writes the original string, and
updates len to contain the new length.
Returns zero on failure, setting C<len> to -1.
=cut
*/
U8 *
Perl_utf8_to_bytes(pTHX_ U8* s, STRLEN *len)
{
U8 *send;
U8 *d;
U8 *save = s;
/* ensure valid UTF8 and chars < 256 before updating string */
for (send = s + *len; s < send; ) {
U8 c = *s++;
if (c >= 0x80 &&
((s >= send) ||
((*s++ & 0xc0) != 0x80) || ((c & 0xfe) != 0xc2))) {
*len = -1;
return 0;
}
}
d = s = save;
while (s < send) {
if (UTF8_IS_ASCII(*s)) {
*d++ = *s++;
}
else {
STRLEN ulen;
*d++ = (U8)utf8_to_uv_simple(s, &ulen);
s += ulen;
}
}
*d = '\0';
*len = d - save;
return save;
}
/*
=for apidoc A|U8 *|bytes_from_utf8|U8 *s|STRLEN *len|bool *is_utf8
Converts a string C<s> of length C<len> from UTF8 into byte encoding.
Unlike <utf8_to_bytes> but like C<bytes_to_utf8>, returns a pointer to
the newly-created string, and updates C<len> to contain the new
length. Returns the original string if no conversion occurs, C<len>
is unchanged. Do nothing if C<is_utf8> points to 0. Sets C<is_utf8> to
0 if C<s> is converted or contains all 7bit characters.
=cut */
U8 *
Perl_bytes_from_utf8(pTHX_ U8* s, STRLEN *len, bool *is_utf8)
{
U8 *send;
U8 *d;
U8 *start = s;
I32 count = 0;
if (!*is_utf8)
return start;
/* ensure valid UTF8 and chars < 256 before converting string */
for (send = s + *len; s < send;) {
U8 c = *s++;
if (!UTF8_IS_ASCII(c)) {
if (UTF8_IS_CONTINUATION(c) || s >= send ||
!UTF8_IS_CONTINUATION(*s) || UTF8_IS_DOWNGRADEABLE_START(c))
return start;
s++, count++;
}
}
*is_utf8 = 0;
if (!count)
return start;
Newz(801, d, (*len) - count + 1, U8);
s = start; start = d;
while (s < send) {
U8 c = *s++;
if (UTF8_IS_ASCII(c))
*d++ = c;
else
*d++ = UTF8_ACCUMULATE(c, *s++);
}
*d = '\0';
*len = d - start;
return start;
}
/*
=for apidoc A|U8 *|bytes_to_utf8|U8 *s|STRLEN *len
Converts a string C<s> of length C<len> from ASCII into UTF8 encoding.
Returns a pointer to the newly-created string, and sets C<len> to
reflect the new length.
=cut
*/
U8*
Perl_bytes_to_utf8(pTHX_ U8* s, STRLEN *len)
{
U8 *send;
U8 *d;
U8 *dst;
send = s + (*len);
Newz(801, d, (*len) * 2 + 1, U8);
dst = d;
while (s < send) {
if (UTF8_IS_ASCII(*s))
*d++ = *s++;
else {
UV uv = *s++;
*d++ = UTF8_EIGHT_BIT_HI(uv);
*d++ = UTF8_EIGHT_BIT_LO(uv);
}
}
*d = '\0';
*len = d-dst;
return dst;
}
/*
* Convert native (big-endian) or reversed (little-endian) UTF-16 to UTF-8.
*
* Destination must be pre-extended to 3/2 source. Do not use in-place.
* We optimize for native, for obvious reasons. */
U8*
Perl_utf16_to_utf8(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen)
{
U8* pend;
U8* dstart = d;
if (bytelen & 1)
Perl_croak(aTHX_ "panic: utf16_to_utf8: odd bytelen");
pend = p + bytelen;
while (p < pend) {
UV uv = (p[0] << 8) + p[1]; /* UTF-16BE */
p += 2;
if (uv < 0x80) {
*d++ = uv;
continue;
}
if (uv < 0x800) {
*d++ = (( uv >> 6) | 0xc0);
*d++ = (( uv & 0x3f) | 0x80);
continue;
}
if (uv >= 0xd800 && uv < 0xdbff) { /* surrogates */
UV low = *p++;
if (low < 0xdc00 || low >= 0xdfff)
Perl_croak(aTHX_ "Malformed UTF-16 surrogate");
uv = ((uv - 0xd800) << 10) + (low - 0xdc00) + 0x10000;
}
if (uv < 0x10000) {
*d++ = (( uv >> 12) | 0xe0);
*d++ = (((uv >> 6) & 0x3f) | 0x80);
*d++ = (( uv & 0x3f) | 0x80);
continue;
}
else {
*d++ = (( uv >> 18) | 0xf0);
*d++ = (((uv >> 12) & 0x3f) | 0x80);
*d++ = (((uv >> 6) & 0x3f) | 0x80);
*d++ = (( uv & 0x3f) | 0x80);
continue;
}
}
*newlen = d - dstart;
return d;
}
/* Note: this one is slightly destructive of the source. */
U8*
Perl_utf16_to_utf8_reversed(pTHX_ U8* p, U8* d, I32 bytelen, I32 *newlen)
{
U8* s = (U8*)p;
U8* send = s + bytelen;
while (s < send) {
U8 tmp = s[0];
s[0] = s[1];
s[1] = tmp;
s += 2;
}
return utf16_to_utf8(p, d, bytelen, newlen);
}
/* for now these are all defined (inefficiently) in terms of the utf8 versions */
bool
Perl_is_uni_alnum(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return is_utf8_alnum(tmpbuf);
}
bool
Perl_is_uni_alnumc(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return is_utf8_alnumc(tmpbuf);
}
bool
Perl_is_uni_idfirst(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return is_utf8_idfirst(tmpbuf);
}
bool
Perl_is_uni_alpha(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return is_utf8_alpha(tmpbuf);
}
bool
Perl_is_uni_ascii(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return is_utf8_ascii(tmpbuf);
}
bool
Perl_is_uni_space(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return is_utf8_space(tmpbuf);
}
bool
Perl_is_uni_digit(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return is_utf8_digit(tmpbuf);
}
bool
Perl_is_uni_upper(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return is_utf8_upper(tmpbuf);
}
bool
Perl_is_uni_lower(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return is_utf8_lower(tmpbuf);
}
bool
Perl_is_uni_cntrl(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return is_utf8_cntrl(tmpbuf);
}
bool
Perl_is_uni_graph(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return is_utf8_graph(tmpbuf);
}
bool
Perl_is_uni_print(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return is_utf8_print(tmpbuf);
}
bool
Perl_is_uni_punct(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return is_utf8_punct(tmpbuf);
}
bool
Perl_is_uni_xdigit(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return is_utf8_xdigit(tmpbuf);
}
U32
Perl_to_uni_upper(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return to_utf8_upper(tmpbuf);
}
U32
Perl_to_uni_title(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return to_utf8_title(tmpbuf);
}
U32
Perl_to_uni_lower(pTHX_ U32 c)
{
U8 tmpbuf[UTF8_MAXLEN+1];
uv_to_utf8(tmpbuf, (UV)c);
return to_utf8_lower(tmpbuf);
}
/* for now these all assume no locale info available for Unicode > 255 */
bool
Perl_is_uni_alnum_lc(pTHX_ U32 c)
{
return is_uni_alnum(c); /* XXX no locale support yet */
}
bool
Perl_is_uni_alnumc_lc(pTHX_ U32 c)
{
return is_uni_alnumc(c); /* XXX no locale support yet */
}
bool
Perl_is_uni_idfirst_lc(pTHX_ U32 c)
{
return is_uni_idfirst(c); /* XXX no locale support yet */
}
bool
Perl_is_uni_alpha_lc(pTHX_ U32 c)
{
return is_uni_alpha(c); /* XXX no locale support yet */
}
bool
Perl_is_uni_ascii_lc(pTHX_ U32 c)
{
return is_uni_ascii(c); /* XXX no locale support yet */
}
bool
Perl_is_uni_space_lc(pTHX_ U32 c)
{
return is_uni_space(c); /* XXX no locale support yet */
}
bool
Perl_is_uni_digit_lc(pTHX_ U32 c)
{
return is_uni_digit(c); /* XXX no locale support yet */
}
bool
Perl_is_uni_upper_lc(pTHX_ U32 c)
{
return is_uni_upper(c); /* XXX no locale support yet */
}
bool
Perl_is_uni_lower_lc(pTHX_ U32 c)
{
return is_uni_lower(c); /* XXX no locale support yet */
}
bool
Perl_is_uni_cntrl_lc(pTHX_ U32 c)
{
return is_uni_cntrl(c); /* XXX no locale support yet */
}
bool
Perl_is_uni_graph_lc(pTHX_ U32 c)
{
return is_uni_graph(c); /* XXX no locale support yet */
}
bool
Perl_is_uni_print_lc(pTHX_ U32 c)
{
return is_uni_print(c); /* XXX no locale support yet */
}
bool
Perl_is_uni_punct_lc(pTHX_ U32 c)
{
return is_uni_punct(c); /* XXX no locale support yet */
}
bool
Perl_is_uni_xdigit_lc(pTHX_ U32 c)
{
return is_uni_xdigit(c); /* XXX no locale support yet */
}
U32
Perl_to_uni_upper_lc(pTHX_ U32 c)
{
return to_uni_upper(c); /* XXX no locale support yet */
}
U32
Perl_to_uni_title_lc(pTHX_ U32 c)
{
return to_uni_title(c); /* XXX no locale support yet */
}
U32
Perl_to_uni_lower_lc(pTHX_ U32 c)
{
return to_uni_lower(c); /* XXX no locale support yet */
}
bool
Perl_is_utf8_alnum(pTHX_ U8 *p)
{
if (!is_utf8_char(p))
return FALSE;
if (!PL_utf8_alnum)
/* NOTE: "IsWord", not "IsAlnum", since Alnum is a true
* descendant of isalnum(3), in other words, it doesn't
* contain the '_'. --jhi */
PL_utf8_alnum = swash_init("utf8", "IsWord", &PL_sv_undef, 0, 0);
return swash_fetch(PL_utf8_alnum, p);
/* return *p == '_' || is_utf8_alpha(p) || is_utf8_digit(p); */
#ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */
if (!PL_utf8_alnum)
PL_utf8_alnum = swash_init("utf8", "",
sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0);
return swash_fetch(PL_utf8_alnum, p);
#endif
}
bool
Perl_is_utf8_alnumc(pTHX_ U8 *p)
{
if (!is_utf8_char(p))
return FALSE;
if (!PL_utf8_alnum)
PL_utf8_alnum = swash_init("utf8", "IsAlnumC", &PL_sv_undef, 0, 0);
return swash_fetch(PL_utf8_alnum, p);
/* return is_utf8_alpha(p) || is_utf8_digit(p); */
#ifdef SURPRISINGLY_SLOWER /* probably because alpha is usually true */
if (!PL_utf8_alnum)
PL_utf8_alnum = swash_init("utf8", "",
sv_2mortal(newSVpv("+utf8::IsAlpha\n+utf8::IsDigit\n005F\n",0)), 0, 0);
return swash_fetch(PL_utf8_alnum, p);
#endif
}
bool
Perl_is_utf8_idfirst(pTHX_ U8 *p)
{
return *p == '_' || is_utf8_alpha(p);
}
bool
Perl_is_utf8_alpha(pTHX_ U8 *p)
{
if (!is_utf8_char(p))
return FALSE;
if (!PL_utf8_alpha)
PL_utf8_alpha = swash_init("utf8", "IsAlpha", &PL_sv_undef, 0, 0);
return swash_fetch(PL_utf8_alpha, p);
}
bool
Perl_is_utf8_ascii(pTHX_ U8 *p)
{
if (!is_utf8_char(p))
return FALSE;
if (!PL_utf8_ascii)
PL_utf8_ascii = swash_init("utf8", "IsAscii", &PL_sv_undef, 0, 0);
return swash_fetch(PL_utf8_ascii, p);
}
bool
Perl_is_utf8_space(pTHX_ U8 *p)
{
if (!is_utf8_char(p))
return FALSE;
if (!PL_utf8_space)
PL_utf8_space = swash_init("utf8", "IsSpacePerl", &PL_sv_undef, 0, 0);
return swash_fetch(PL_utf8_space, p);
}
bool
Perl_is_utf8_digit(pTHX_ U8 *p)
{
if (!is_utf8_char(p))
return FALSE;
if (!PL_utf8_digit)
PL_utf8_digit = swash_init("utf8", "IsDigit", &PL_sv_undef, 0, 0);
return swash_fetch(PL_utf8_digit, p);
}
bool
Perl_is_utf8_upper(pTHX_ U8 *p)
{
if (!is_utf8_char(p))
return FALSE;
if (!PL_utf8_upper)
PL_utf8_upper = swash_init("utf8", "IsUpper", &PL_sv_undef, 0, 0);
return swash_fetch(PL_utf8_upper, p);
}
bool
Perl_is_utf8_lower(pTHX_ U8 *p)
{
if (!is_utf8_char(p))
return FALSE;
if (!PL_utf8_lower)
PL_utf8_lower = swash_init("utf8", "IsLower", &PL_sv_undef, 0, 0);
return swash_fetch(PL_utf8_lower, p);
}
bool
Perl_is_utf8_cntrl(pTHX_ U8 *p)
{
if (!is_utf8_char(p))
return FALSE;
if (!PL_utf8_cntrl)
PL_utf8_cntrl = swash_init("utf8", "IsCntrl", &PL_sv_undef, 0, 0);
return swash_fetch(PL_utf8_cntrl, p);
}
bool
Perl_is_utf8_graph(pTHX_ U8 *p)
{
if (!is_utf8_char(p))
return FALSE;
if (!PL_utf8_graph)
PL_utf8_graph = swash_init("utf8", "IsGraph", &PL_sv_undef, 0, 0);
return swash_fetch(PL_utf8_graph, p);
}
bool
Perl_is_utf8_print(pTHX_ U8 *p)
{
if (!is_utf8_char(p))
return FALSE;
if (!PL_utf8_print)
PL_utf8_print = swash_init("utf8", "IsPrint", &PL_sv_undef, 0, 0);
return swash_fetch(PL_utf8_print, p);
}
bool
Perl_is_utf8_punct(pTHX_ U8 *p)
{
if (!is_utf8_char(p))
return FALSE;
if (!PL_utf8_punct)
PL_utf8_punct = swash_init("utf8", "IsPunct", &PL_sv_undef, 0, 0);
return swash_fetch(PL_utf8_punct, p);
}
bool
Perl_is_utf8_xdigit(pTHX_ U8 *p)
{
if (!is_utf8_char(p))
return FALSE;
if (!PL_utf8_xdigit)
PL_utf8_xdigit = swash_init("utf8", "IsXDigit", &PL_sv_undef, 0, 0);
return swash_fetch(PL_utf8_xdigit, p);
}
bool
Perl_is_utf8_mark(pTHX_ U8 *p)
{
if (!is_utf8_char(p))
return FALSE;
if (!PL_utf8_mark)
PL_utf8_mark = swash_init("utf8", "IsM", &PL_sv_undef, 0, 0);
return swash_fetch(PL_utf8_mark, p);
}
UV
Perl_to_utf8_upper(pTHX_ U8 *p)
{
UV uv;
if (!PL_utf8_toupper)
PL_utf8_toupper = swash_init("utf8", "ToUpper", &PL_sv_undef, 4, 0);
uv = swash_fetch(PL_utf8_toupper, p);
return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0);
}
UV
Perl_to_utf8_title(pTHX_ U8 *p)
{
UV uv;
if (!PL_utf8_totitle)
PL_utf8_totitle = swash_init("utf8", "ToTitle", &PL_sv_undef, 4, 0);
uv = swash_fetch(PL_utf8_totitle, p);
return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0);
}
UV
Perl_to_utf8_lower(pTHX_ U8 *p)
{
UV uv;
if (!PL_utf8_tolower)
PL_utf8_tolower = swash_init("utf8", "ToLower", &PL_sv_undef, 4, 0);
uv = swash_fetch(PL_utf8_tolower, p);
return uv ? uv : utf8_to_uv(p,UTF8_MAXLEN,0,0);
}
/* a "swash" is a swatch hash */
SV*
Perl_swash_init(pTHX_ char* pkg, char* name, SV *listsv, I32 minbits, I32 none)
{
SV* retval;
SV* tokenbufsv = sv_2mortal(NEWSV(0,0));
dSP;
if (!gv_stashpv(pkg, 0)) { /* demand load utf8 */
ENTER;
Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, newSVpv(pkg,0), Nullsv);
LEAVE;
}
SPAGAIN;
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
EXTEND(SP,5);
PUSHs(sv_2mortal(newSVpvn(pkg, strlen(pkg))));
PUSHs(sv_2mortal(newSVpvn(name, strlen(name))));
PUSHs(listsv);
PUSHs(sv_2mortal(newSViv(minbits)));
PUSHs(sv_2mortal(newSViv(none)));
PUTBACK;
ENTER;
SAVEI32(PL_hints);
PL_hints = 0;
save_re_context();
if (PL_curcop == &PL_compiling)
/* XXX ought to be handled by lex_start */
sv_setpv(tokenbufsv, PL_tokenbuf);
if (call_method("SWASHNEW", G_SCALAR))
retval = newSVsv(*PL_stack_sp--);
else
retval = &PL_sv_undef;
LEAVE;
POPSTACK;
if (PL_curcop == &PL_compiling) {
STRLEN len;
char* pv = SvPV(tokenbufsv, len);
Copy(pv, PL_tokenbuf, len+1, char);
PL_curcop->op_private = PL_hints;
}
if (!SvROK(retval) || SvTYPE(SvRV(retval)) != SVt_PVHV)
Perl_croak(aTHX_ "SWASHNEW didn't return an HV ref");
return retval;
}
UV
Perl_swash_fetch(pTHX_ SV *sv, U8 *ptr)
{
HV* hv = (HV*)SvRV(sv);
U32 klen = UTF8SKIP(ptr) - 1;
U32 off = ptr[klen] & 127; /* NB: 64 bit always 0 when len > 1 */
STRLEN slen;
STRLEN needents = (klen ? 64 : 128);
U8 *tmps;
U32 bit;
SV *retval;
/*
* This single-entry cache saves about 1/3 of the utf8 overhead in test
* suite. (That is, only 7-8% overall over just a hash cache. Still,
* it's nothing to sniff at.) Pity we usually come through at least
* two function calls to get here...
*
* NB: this code assumes that swatches are never modified, once generated!
*/
if (hv == PL_last_swash_hv &&
klen == PL_last_swash_klen &&
(!klen || memEQ(ptr,PL_last_swash_key,klen)) )
{
tmps = PL_last_swash_tmps;
slen = PL_last_swash_slen;
}
else {
/* Try our second-level swatch cache, kept in a hash. */
SV** svp = hv_fetch(hv, (char*)ptr, klen, FALSE);
/* If not cached, generate it via utf8::SWASHGET */
if (!svp || !SvPOK(*svp) || !(tmps = (U8*)SvPV(*svp, slen))) {
dSP;
ENTER;
SAVETMPS;
save_re_context();
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
EXTEND(SP,3);
PUSHs((SV*)sv);
PUSHs(sv_2mortal(newSViv(utf8_to_uv(ptr, UTF8_MAXLEN, 0, 0) & ~(needents - 1))));
PUSHs(sv_2mortal(newSViv(needents)));
PUTBACK;
if (call_method("SWASHGET", G_SCALAR))
retval = newSVsv(*PL_stack_sp--);
else
retval = &PL_sv_undef;
POPSTACK;
FREETMPS;
LEAVE;
if (PL_curcop == &PL_compiling)
PL_curcop->op_private = PL_hints;
svp = hv_store(hv, (char*)ptr, klen, retval, 0);
if (!svp || !(tmps = (U8*)SvPV(*svp, slen)) || slen < 8)
Perl_croak(aTHX_ "SWASHGET didn't return result of proper length");
}
PL_last_swash_hv = hv;
PL_last_swash_klen = klen;
PL_last_swash_tmps = tmps;
PL_last_swash_slen = slen;
if (klen)
Copy(ptr, PL_last_swash_key, klen, U8);
}
switch ((int)((slen << 3) / needents)) {
case 1:
bit = 1 << (off & 7);
off >>= 3;
return (tmps[off] & bit) != 0;
case 8:
return tmps[off];
case 16:
off <<= 1;
return (tmps[off] << 8) + tmps[off + 1] ;
case 32:
off <<= 2;
return (tmps[off] << 24) + (tmps[off+1] << 16) + (tmps[off+2] << 8) + tmps[off + 3] ;
}
Perl_croak(aTHX_ "panic: swash_fetch");
return 0;
}
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